Engineer, Lead Key Role: Develop solution architecture ( SA ) and resolve complex issues in a variety of projects through the implementation of requirements analysis, expertise support, and project supervision. Apply advanced theories, principles, and concepts and contribute to development of new principles and concepts. Lead development of solutions to highly complex problems. Work with wide latitude for unreviewed action or decision and assume responsibility for supervision and development of first-level supervisors and managers. Oversee all technical aspects of the program that involve engineering development, architecture, and integration and interface design analysis, installation, integration, fielding and field analysis, operations, maintenance, and testing of hardware and sof tware. Ensure that technical planning, leading, organizing, and motivating of teams of contractors and subcontractors are being achieved to a high level of performance and technical and engineering quality. Research, cost-justify, recommend, and establish current and future hardware and sof tware architectures for all aspects of IT, from networks to operating systems and shared sof tware services. Enable system-level design and configuration of products, including determination of hardware, operating systems, and other platform specifications to meet project requirements while maintaining interoperability with existing sponsor networks. Perform a variety of network engineering tasks and activities concerned with major systems design, integration, and implementation, and troubleshoot unique or complex problems.